Two-cycle engine



w. G. GERNANDT.

`Two-CYCLE ENGINE.

APPLICATION FILED IULY 29,1920.

1,385,250,` Patented July 19,/1921,

. l y l q UNITED STATES `PATENT OFFICE.

WAIJDO G. GERNANDT, OF SOUTH BENI), INDIANA, ASSIGNOR TO GERNANDT Moros.l

CORPORATION, OF CHICAGO, ILLINOIS, A. CORPORATION 0F ILLINOIS TWO-CYCLE ENGINE.

T0 all whom t may concern:

Be it known that I, lVaLno G. GERNANDT, a citizen of the United States, and a resident of South Bend, in the county of bt. Joseph and State of Indiana, have invented certain new and useful Improvements in Two-Cycle llngines, of which the following, when taken in connection with the drawings accompanying and forming a part hereof, is a specification.

The invention relates to a two cycle engine which is provided with a fuel pressure tank and a forced feed lubricating system.

Among the objects of the invention are to obtain a two cycle engine of the kind named, wherein the crank chamber is drained of oil without materially reducing the crank chamber compression pressure; and one whereby the oil in the crank chamber is separated from the remainder of the contents of said chamber without materially affecting engine operation; to obtain means whereby a pressure on the oilin system of the engine is automatically maintained; toobtain means whereby a pressure on the fuel supply of the engine is automatically maintained; and

to automatically provide a small quantity of air under pressure for use, as desired, in connection with said two cycle engine. Additional objects are to effect the above recited results withoutthe use of a pump or other pressure producing apparatus additional to the reciprocating piston and crank case of the engine.

In the drawing referred to I haveillustrated a two cycle engine embodying the invention in vertical section, and in elevation a fuel tank, a lubricating oil tank, and conduits connecting said engine and tanks.

A represents the shell of the crank case of a two cycle engine, and A1 the water jacketed cylinder thereof, a, a, being the water'- "2 '1 v1 space of chamber. i represents a cy 1ndrical wall which 1s illustrated as integral with shell A, and substantially concentric to the axial line of cylinder A1. a1 represents a head which is secured to the lower end of cylindrical wall A2, to obtain a fluid tight joint; and a2 represents a similar head which is arranged to close an aperture in the shell A, betweenthe crank case chamber Il and chamber C thereunder. I-Iead a2 is provided with neck a3, having passage way A therethrough, and A* represents a ball Specificatibn of Letters Patent. Patented July 19, 1921- Application led July 29,

1920. Serial No. 399,745.

check valve which is yieldingly held to its seat by spring a".

D are broken lines which indicate the crank shaft of the engine; cl a crank arm on said shaft, and D1 a wrist pin. Z1 represents a connection rod, which is connected at its lower end on wrist pin D1 and at its upper end on pin c of piston E. F, F, represent piston rings on piston E, and G represents a recess on the under end of piston E which registers with the discharge end of passage way H, when the piston is at its lower limit of travel, as indicated by broken lines in the drawing. Bassageway H is in communication at its inlet end with the chamber B in crank case A. I represents the outlet, or discharge port of cylinder A1. J represents a check valve, provided with stem j, which when unseated, opens an inlet passage way `to chamber B. J1 represents a spring one end of which is seated on the spider jl, and the'other end of which presses against washer jg on stem y', to yieldingly hold-valve J to its seat. readily removed for grinding by withdrawing the pin J2 from stem y'.

Asis common to two cycle engines, when the piston E is near its advance limit of travel, the exhaust or discharge port I is opened. the exhaust gases are discharged therethrough, and the contents of chamber B How through passafre way H into the engine cylinder, recess directing said inflow upward, to prevent interanixing thereof with the outflowing exhaust gases. And on the combined inspiration and compression travel of piston E, the pressure in chamber.

B is lessthan atmospheric, and an inflow of air, or fluid mixture (as preferred) through check valve J is produced.v On the power cycletravel of said piston E the contents of the chamber B are put under pressure, check valve A* is unseated, and the contents of chamber' C are equalized in )ressure with the contents of said chamber K represents a lubricating oil tank, and L a fuel tank. P represents a conduit or pipe the inlet endwhereof is in 'communication with chamber C, said pipe being attached to head al; and the outlet end thereof is in tank K near its upper end, and y? represents a check valve in conduit or pipe P, to prevent a flow of fluid from said pipe into chamber C, while permitting a flow from said chamber Vinto said pipe. a pipe or conduit, the inlet end whereof is in Chamber C, above the bottoni ot said eliainber, and the outlet end in Chamber L, near the upper end thereof. g represents a. cheek Vvalve in pipe or conduit Q, to prel'vent a back lion' of 'fluid 'from said conduit to ehainber C, While permitting a flow troni said rhainber into said pipe or conduit. Y represents a discharge pipe from tank l, and y a discharge pipe 'trein tank L. Pipe Y is eonneeted to the oiling system ot the engin-e; and. Y to the 'fuel supply systein.

The operation of the device is; when oil land air,or oil and fuel mixture is eontained in chamber B, on the outward or power travel et piston E pressure is applied to said contents, and seine thereof, ineluding said oilv is forced through passage way A3, into chamber C; and pressure in said Chainber 'C forces the Contents thereof therefrom and through pipes or conduits P, Q, into tanks l and L.

rlhe inlet to pipe P being in the bottom' (head al) ot chamber C, any lubricating oil therein will be forced into said pipe P. 'ilhe inlet to pipe Q being above the bottonrof chamber C, air, or fuel mixture, will be forced from said Chamber into said pipe.

".lhe resiliency or' springs a4 and J1, is not required to be greater than to merely seat valves A4 and tl, respectively.

l Claim;

'1. ln a tive eyele engine Whie'h is provided with a. 'fuel tank and a. lubricating oil tank, the combination of a Crank ease Chamber, a chamber positioned below said Crank ease chamber, a passage Waybetween said cham- Q represents ,aso

bers. means to obstruet eoninninieation in said passage. way between said last ehainlier and said lirst eliainber, and to yieldingrly obstruct eoinnnniieation troni said iirst chamber and said last chamber, a passage way arranged to convey lubricatingoil and pressure from said last ehainber to si, brirating oil tank, and an additimial i" sagre Way arranged to convey gases and pressure 'frein said last chamber to said fuel tanlr.

2. ln a two Cycle engine provided with an oil supply tanlrmeans to diseharge oil and gases troni the eranlr ease ehaniber ol said engine, nieans to separate said oil and gases subsequent to said discharge, ineans to apply pressure to said oil and gases suiaieqnent to said discharge and separation, said last ineans munprisiueY a elnnnber additional to the Crank ease Chamber of' the engine, and a. communicating passage way yieldingrly ob structed to the How 'troni said eranli ease ehainber to .said additional ehaniber and obH structed to the lion' Ain an opposite lirertion.

3. ln a two cycle engine provided with a iuel tank arranged to hare pressure applied to the Contents thereof, a crank ease ehaanber and an additional chamber` the combination of ineans to direc-t a lion' ol' the eontents ol' said crank ease ehaniber to said additional Chamber and to obstruct a lion' in the opp site direction, and to direct contents of said additional chamber to said Vfuel tank and obstruct the flow of the eontents ol said fuel tank to said additional chamber.

TWirLD (l. Glllilfri ln the presence of 'EL S. Yldnirnnr7 F. W. lFIsnnUnN.

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